Key hook



FIG. 1 is a perspective view of a key hook showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines are included for the purpose of illustrating unclaimed portions of the structure and form no part of the claimed design. 

The ornamental design for a key hook, as shown and described. 